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Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Hydroxylherderite from
Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA


09406240017363514003851.jpg
Hydroxylherderite

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
03610350017272023307365.jpg
Hydroxylherderite, etc.

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
08436850017568521711063.jpg
Hydroxylherderite, etc.

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
09406240017363514003851.jpg
Hydroxylherderite

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
03610350017272023307365.jpg
Hydroxylherderite, etc.

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
08436850017568521711063.jpg
Hydroxylherderite, etc.

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
09406240017363514003851.jpg
Hydroxylherderite

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
08138270017272023319852.jpg
Hydroxylherderite, etc.

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
08436850017568521711063.jpg
Hydroxylherderite, etc.

Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
Locality type:Quarry
Classification
Species:Hydroxylherderite
Formula:CaBe(PO4)(OH)
Confirmation
Validity:Confirmed
Confirmation Methods:XRD
SEM-EDS
Associated Minerals Based on Photo Data:
Greifensteinite2
Albite2
Quartz1
Moraesite1
Data
Mineral Data:Click here to view Hydroxylherderite data
Locality Data:Click here to view Estes Quarry, West Baldwin, Baldwin, Cumberland County, Maine, USA
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:32887
Long-form Identifier:1:3:32887:2
GUID (UUID V4):0
Nearest other occurrences of Hydroxylherderite
42.8km (26.6 miles) ⓘLord Hill Quarry (Lord Hill Mine), Stoneham, Oxford County, Maine, USA
45.8km (28.4 miles) ⓘBerry-Havey Quarry, Poland, Androscoggin County, Maine, USA
46.5km (28.9 miles) ⓘPulsifer Quarry & Dionne extension, West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
46.6km (29.0 miles) ⓘKeith Quarry (Towne Quarry), West Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
47.2km (29.3 miles) ⓘMaine Feldspar Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
47.4km (29.4 miles) ⓘGreenlaw Quarry, East Mount Apatite Mining District, Auburn, Androscoggin County, Maine, USA
47.7km (29.6 miles) ⓘB.B. No. 7 Quarry, Norway, Oxford County, Maine, USA
48.7km (30.3 miles) ⓘTamminen Quarry, Greenwood, Oxford County, Maine, USA
48.8km (30.3 miles) ⓘWaisanen Quarry (Tamminen-Waisanen Quarry), Greenwood, Oxford County, Maine, USA
49.4km (30.7 miles) ⓘNoyes Mountain Quarry (Harvard Quarry), Greenwood, Oxford County, Maine, USA
References
Thompson, Woodrow B., Bearss, Gene T., Falster, Alexander U., Simmons, William B., Nizamoff, Jams W. (2000) The Estes Quarry, Cumberland County, Maine: A New Pegmatite Mineral Locality. Rocks & Minerals, 75 (6) 408-418 doi:10.1080/00357520009605667
 
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